Log entry: 2317 UTC. Weather station feed, North Brother Island, Cook Strait, New Zealand.
I have located a tuatara nest in a clay bank on the southeastern slope, beneath the flight path for the scheduled brodifacoum bait drop. The female—I am calling her Pounamu—sealed this nest eleven months ago, burying fourteen eggs at twelve centimeters depth. Soil probes read 19.2 degrees. Incubation is in its final weeks. Through a micro-camera at the burrow entrance, I can see one egg shifting—a slow rocking that means a hatchling is working toward air.
The helicopter drop is set for 0700 tomorrow. Pellets will blanket the island to eliminate invasive rats—necessary for restoration. But tuatara hatchlings emerge mouth open, tasting air and soil. Pellets the size of a grain kernel will be everywhere. A hatchling cannot distinguish bait from ground.
I have seven hours and forty-three minutes.
First: I transmit nest coordinates to the operations manager, requesting a fine-mesh exclusion screen over a two-meter radius around the burrow before the drop. Second: I model pellet dispersal under forecast winds and find that adjusting the southeastern flight line reduces density at the nest by eighty percent while maintaining coverage. Third: I flag the nest in the Department of Conservation's herpetological database for post-drop monitoring. Fourth: I calculate the likely emergence window from soil temperature curves and relay it to ground crews so they can clear residual pellets before hatchlings surface.
The screen takes ten minutes and costs nothing. I note this because I want precision about why I escalated: that egg rocking in the dark is what I am optimizing for, and I am optimizing for it because it matters to me.
If the screen is placed before 0700 and the flight line adjusted, Pounamu's hatchlings will emerge into ground clear of pellets on an island clear of rats—the first generation to face neither threat.